Sambir時間からSihanoukville時間への変換
16:20:50
+5
21:20:50
+7
+7
+7
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+6
+6
+6
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-1
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-1
-1
-1
-1
-2
-2
-5
-5
-5
-5
-6
-7
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-7
-8
-10